Hood for electric lamps.



H. RITHNER.

HOOD FOR ELECTRIC LAMPS.

APPLcATIoN NLRB APR.7,1913.

1 ,086,787 Patened Feb. i0, MVM,

UNITED A'STATES PATEN T OFFICE.

HENRY RITHNER, OF WELLSBURG, WEST VIRGINIA, ASSIGNOR TO CRESCENT GLASS COMPANY, OF WELLSBURG, WEST VIRGINIA, A CORPORATION 0F WEST VIRGINIA.

Hoon Foa ELECTRIC LAMPS.

y.Specification of Letters Patent.

Patented Feb. 10, 1914.

Application led April 7, 1913. vSerial N o. 759,311.

To all whom it may concern.'

Be it known that I, HENRY RITiiNER, a citizen of the United States of America, and resident of `Wellsburg, county of Brooke, and State of West Virginia, have invented certain new and useful Improvements 1n Hoods for Electric Lamps, of which the following is a specification.

This invention relates broadly to hoods for electric lamps, and specifically to a hood and attaching means t erefor. u

The primary object of the invention 1s to provide' a transparent lamp-inclosing hood of the general type commonly employed 1n electric signs, having novel and improved means for attachment whereby it is held in fixed relation to the lamp and whereby the latter is, at the same time, yieldingly engaged, permitting the lamp to freely expand and contract.

A further object is to provide a glass hood of the character mentioned which may beformed by pressing, as distinguished from hoods which require that they be blown2 thus insuring a uniformity of thickness, which is impossible of attainment in hoods formed by blowing.

Further important objects will in part be made apparent and in part pointed out hereinafter.

The invention resides in the features of construction, arrangement of parts and conibinations of elements which will hereinafter be exemplified, reference being had to the accompanying drawings, forming a part of. this specification, in which- Figure l is a side elevation of the invenA t'ion; Fig. 2 is a longitudinal section of the same; Fig. 3 is a side elevation of the hood; l `ig.v4 is a cross sectionI ofthe hood-supporting ring or ,collarg land Fig. 5, is a' bottom. plan view of the saine.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views-l indicates an electric lamp bulb which is seated in a lamp socket 2, as ordinarily. Loosely encircling the neck of the bulb 1 and seated against the outer end of the socket 2 is a ring or collar 3, preferably formed of sheetmetal, having an annular outwardly directed Hangs 4 .which has screw-threads 4; formed therein for receiving the external threads 5 formed about the mouth of a glass hood 6.which wholly incloses the: lamp bulb 1. Said hood is threaded within the j 'nge 4 of the ring or collar 3 and .isthus rigidly supported with respect to said collar. Constituting means whereby said collar is yieldingly supported is a plurality of spring fingers 7 formed integral .with said collar and projecting from the inner periphery thereof. Said lingers normally lie iny parallel alinement with the longitudinal axis of the collar, or at substantially right angles to the plane of the body portion of said collar, as shown in'Fig. 4, and are adapted tolyieldingly seat4 upon the bulb adjacent to that portion thereof having the smallest diameter, and, when so seated, to be pressed slightly outward in an inclined direction toward that portion of the bulb having the greatest diameter, as shown-in Fig. 2. Said fingers are preferably weakened adjacent to their points of junction with the collar by undercutting at opposite sides to lessen the width, as shown at 7, so that iiexure resulting from pressure thereon will occur primarily adjacent to the collar, causing said fingers to lie substantially fiat upon the surface of the bulb, as shown in Fig. 2.

'Ihe collar is placed in encircling relation to the smaller' end of the bulb prlor to the mounting of the saine in the socket 2. As the bulb is threaded into the socket, the fingers are gradually flexed outward from their normal positions in parallel alineme'nt with thc axis of the bulb to inclined positions, substantially as shown in Fig. 2'. A yielding support is thus constituted for the hood 6 which is then threaded within the flange 4 of the collar` Owing to the fact that the bulb is engaged only by the yielding spring fingers, expansion and contraction of the bulb is readily permitted without undue strain being placed on the latter.

A plurality of suitable holes or apertures. as 8, are provided in the body portion of the collar for permitting ofthe ready escape of heat generated in the lamp. The said body portion serves as a. reiiector whereby inwardly directed light rays, which are .per-

mitted by the usual or vcommon forms of hood-supports to escape through the mouthA of the hood, and to be thus wasted, are-fdirected back and outthrough the hood.

As is apparent, the hood 6 may be made in a press-mold as well as in a blow-mold, I in view of the fact that its interior is plain and smooth, offering no hindrance to the' withdrawal of the plunger ofsuch press mold. This is an advantageous feature, par- ,l ticularly because the Walls of hoods formed l by pressing may be made of uniform thicl y ness throughout, not being affected by diferl ences of temperature in di'erent parts of the mold, as in the-process of manufacture in blow-molds. i

Having thus described my invention, what I claim as new, and desire to secure by Letters Pa tent, is

l. The combination with a lamp bulb, of a hood inclosing said bulb, and hood-supporting means comprising a metal bulb-en circling collar having an outwardly directed peripheral flange within which said hood is adapted to seat, and having integral resili. ent fingers for seating uponsaid bulb.

2. The combination with a lamp bulb, of a hood inclosing said bulb, and hood-supporting means comprising a metal bulb-encircling collar having an outwardly directed peripheral flange Within which said hood is adapted to seat, and having integral resilient fingersI for seating upon said bulb, said fingers normally lying in planes parallel to the axis of' the bulb.

3. The combination With a lamp bulb, of a hood inclosing said bulb, and hoodsupporting means comprising a metal bulb`encircling collar having an outwardly directed peripheral flange Within which said hood l is adapted to seat, and having integral yielding fingers adapted to seat substantially flatwise upon the surface of said bulb.

4. The combination with a lamp bulb, of a hood inclosing said bulb, and hood-supporting means comprising a mcfal bulb-en circling collar having an outwardly directed peripheral flange for the reception of theI open end of said hood, and integral fingers formed on the inner periphery of sait' collar and adapted to yieldingly seat upon the surface of the bulb, said fingers normally occupying planes substantially parallel to Jdie axis of the bulb and being adapted lo be forced outward to positions substantially parallel to the surface engaged thereby.

5. rThe combination with a lamp bulb, of au inclosing hood for said bulb. and a hoodsuppoifcing member, said member comprising a shcetanetal collar disposed in encircling relation lo the neck portion of said bulb and having a plurality of resilient fingers projecting outward from its inner periphery in a direction substantially at right angles thereto for yieldingly seating upon the surface of said bulb behind the point of greatest diameter of the latter, and a pea bulb-inclosing hood, and a hoo( ripheral flange formed on said collar and Within which said hood is adaptedto seat.

6. The combination with a lamp bulb, oi a hood for inclosing said bulb, said hood being threaded exteriorly at a point adjacent to the mouth thereof, and a hood-supporting member, said member comprising a collar for loosely encircling the neck portion of said bulb and having a peripheral tlreafled flange for receiving the threaded portion of said hood, and a plurality of resilientfingers formed. on the inner periphery of said collar and adapted to yieldingly seat upon the surface of said bul 7. The combination with a lam bulb, of -suppoit lng member comprising a collar `for loosely encircling said bulb and constituting a re- Hector for light rays, an outer peripheral flange formed on said collar and` in which said hood is adapted to firmly seat, and rosilient fingers `formed on the inner periphery of said collar and adapted to seat upon the surface of said bulb.

8. The combination with a lamp bulb, of a. bulb-inclosing hood, and a hood-supporting member comprising a collar for loosely encircling said bulb and constituting a reflector for light rays, said collar having heat-outlet openings therein, an outer peripheral flange formed on said collar and in which said hood is adapted to firmly seat, and resilient fingers formed on the inner periphery of said collar and adapted to yieldingly seat upon the surface of said I bulb.

9. The combination with a lamp bulb, of a hood inclosing said bulb, and hood-sup porting means comprising a metal bulb` encircling collar having an outwardly directcd peripheral flange within which said hood is adapted to sea t, and having integral resilient fingers for sealing upon said bulb, ysaid fingers being weakened by undercutting at points adjacent to their points of junction with said collar.

l0. The combination with a lamp bulb, of :t hood having a smooth unbroken interior surface, means for supporting said hood comprising a collar loosely encircling the neck portion of said bulb and having an outer peripheral flange adapted to firmly seat said hood, and resilient fingers formed on said collar for seating upon the surface of said bulb. p

ln testimony Wl'lereof, l aflix my signature in ypresence of two subscribing Witnesses.

HENRY RITHNER; VJitnesses G. W. MCCLEARY, Tnos. S. HeNnEnsoN.

yieldingly 

